Low-Capacity High-Durability Subsea Battery
Model:
SYEV01259148LP
Cell Chemistry:
Lithium ion
Nominal Voltage:
25.9 V
Capacity:
249.6 Ah
Energy:
6464.64 Wh
Internal Resistance:
< 300 mΩ
Modules per Battery:
4 modules
Temperature Sensors:
5 (1 Internal MOS, 4 Battery Pack) (Range: -40°C to +125°C)
Humidity Sensor:
1 (HDC3021QDEHRQ1) (Range: 0–100% RH)
Communication Interfaces:
RS485 & Isolated CAN - Customizable
Charging Voltage:
29.4 V
Charging Float Voltage (Standby):
28 V
Allowed Max Charge Current:
10 A
Recommended Charge Current:
15 A
Charge Temp Range:
-20°C to 45°C (with Heater Kit)
Discharging Operating Voltage Range:
19.25 V to 29.75 V
Discharging Low Voltage Cut-Off:
19.25 V
Recommended Discharge Current:
30 A
Max Discharge Current:
50 A
Pulse Discharge Current:
150 A
Discharge Temp Range:
-20°C to 50°C
Dimensions (Diameter × Length):
338 mm × 360 mm
Casing:
Aluminum
Weight:
Approx. > 82 kg without titanium casing
Fasteners:
M6 SS304
Underwater Pressure Rating:
Maximum 11000 Bar with Titanium casing
Storage < 3 Months:
-10°C to 30°C, 45–75% RH
Storage < 1 Month:
-20°C to 35°C, 45–75% RH
Recommended Storage Range:
15–35°C, 45–75% RH
Self-discharge Rate:
≤3%/month; ≤15%/year
Reversible Capacity Loss:
≤1.5%/month; ≤8%/year
Storage Instruction (>3 Months):
Store at 25.9 V (50% SOC) & cycle every 6 months
Description of the Product
This 25.9 V, 249.6 Ah lithium-ion battery is engineered to power underwater vehicles such as ROVs, AUVs, and submersibles. With 6.4 kWh of energy, it ensures reliable and sustained performance in deep-sea missions. Its smart BMS provides real-time monitoring and safeguards against overcurrent, temperature extremes, and short circuits. The system supports RS485 and isolated CAN communication for seamless integration. Designed with marine-grade aluminum casing and corrosion-resistant SS304 fasteners, it withstands high pressure and harsh marine conditions. Advanced sensors track temperature and humidity to ensure operational stability even in extreme underwater environments.
Note: This product is fully customizable to match your unique requirements — including voltage, capacity, application type, design specifications, shape, and size. Reach out to us to build a solution tailored specifically for your equipment or vehicle.